package com.yeu.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

public class AccessFilter implements Filter{

	@Override
	public void destroy() {
		
	}

	@Override
	public void doFilter(ServletRequest arg0, ServletResponse arg1,
			FilterChain arg2) throws IOException, ServletException {
		HttpServletRequest request=(HttpServletRequest)arg0;
		HttpServletResponse response=(HttpServletResponse)arg1;
		HttpSession session=request.getSession();
		String roleId=(String)session.getAttribute("roleId");
		//add by jcy;
		response.addHeader("Cache-Control", "no-cache,must-revalidate");
		//end
		if(roleId==null 
				&& request.getRequestURI().indexOf("login")==-1
				&& request.getRequestURI().indexOf("Login")==-1
				&& (request.getRequestURI().indexOf(".")==-1 || request.getRequestURI().indexOf(".html")!=-1 || request.getRequestURI().indexOf(".action")!=-1)){
			String path=request.getContextPath();
			String url=request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
			response.sendRedirect(url+"login.html");
			return;
		}
		arg2.doFilter(arg0, arg1);
	}

	@Override
	public void init(FilterConfig arg0) throws ServletException {

	}

}
